Producing ammonia.



- U N 1RD dTATES PATENT @FFIQE CARL BOSCH AND ALW'IN MITTASCH, OF LU'DWIGSI-IAFEN-ON-THE-RHINE, GERMANY,

ASSIGNORS TO BADISCHE ANILIN & SODA FABRIK, OF LUDWIGSHAFEN-ON-THE- RHINE, GERMANY, A CORPORATION.

PRODUCING AMMONIA.

.No Drawing.

To all 1/7/ onl it may concern Be it known that we, (Ann Boson and Anwin' Mrrmseu, subjects. respectively, of the King of Prussia and the King of Saxony, residing at Ludwigsha'ien-on-the- Ithine, Germany, have invented new and can obtain ammonia in good yield by passing a mixture of nitrogen and hydrogen over a mixture of metals or metallic com pounds, such that there is present a metal or other body which has considerable power of taking up nitrogen, and also a metal or I other bodv which is ca mble o'li' takin u hydrogen to a considerable degree. It desired, more than two of the metals or metallic'compounds of the kind having the respective qualities aforesaid can be cmployed, and it is preferred to eniploy such quantities of each kind that there is no very great preponderamzc of that, or those, of the one or of the other kind. It is sometimes advantageous 'to add to the mixture other compound or compounds which promote the production of ammonia.

The following are examples of how this invention can be carried into practical effect, but the invention is not confined to these examples.

Example 1 Heat ammonium molybdate so that a part of the ammonia is driven off and then soak the porous grains in a concentrated solution of palladium nitrate, so that 20 per cent. of palladium nitrate is employed compared with the ammonium molybdate. If desired, two per cent of.

Specification of Letters Patent.

Application filed August 16, i912, Serial No. 715,331.

uranium. nitrate can be added to the falladium nitrate. (.alcinc the mixture until the nitrate is decomposed, reduce the mass with h drogen and introduce it into a. contact tube, or the like.,and pass a current of pure dry hydrogen, and nitrogen, in molecular proportions. over the, mass at 600 C. and a pressure of 150 atmospheres.

Example 2: Work up 2 parts by Weight of ammonium tungstate (free from alkali) and from 1 part, to 2 parts, by weight of nickel nitrate to form a contact mass, as described in the ii'oregoing example, and place it in a contact tube, or the like, and pass a current of pure dry hydrogen and nitrogen over the mass under the conditions stated in Example 1.

Now what we claim is:-

1. The process 01 producing ammonia by passing a mixture of lrvdrogen and nitrogen over a catalytic mixture containing a body which has considerable power of taking up nitrogen and also a body which has .con siderable power of ta king up hydrogen.

2. The process of producing ammonia by passing a mixture of hydrogen and nitrogen over a catalytic mixture containing a metal which hasconsiderable power of taking up nitrogen and also a metal which has considerable power of takingup hydrogen.

3. The process of producing ammonia by passing a mixture of hydrogen and nitrogen over a catalytic mixture containing tungsten and nickel;

In testimony whereof we have hereunto set our hands in the presence of two subscribing witnesses.

CARL BOSCH.

ALWIN MITTASCH.

Witnesses Ennns'r G. EIIRHARD'I, J osizrn Fnirrnn. 

